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HTTP::DAV circular references problem solved

by cosimo (Hermit)
on Aug 05, 2008 at 16:18 UTC ( #702405=perlnews: print w/replies, xml ) Need Help??

Last week I wrote on use.perl about a quite big memory "leak" problem I was experiencing with HTTP::DAV.

Well, "leak" as in "big circular references" between different objects. I think I finally managed to solve it after some days of struggling, trying to write awkward destructors and other debugging pains.

It turned out the solution was simple. Just using Scalar::Util::weaken() on the "hot" back references. The problematic references were between HTTP::DAV and HTTP::DAV::Resource and between HTTP::DAV::Resource and HTTP::DAV::ResourceList.

I'm using HTTP::DAV to export hundreds of thousands of images in many different sizes to some mod_dav-enabled static servers for, well, static serving.
For this I needed the export tool to work for at least 2 days continuously, talking to 3 different servers, and all of this without problems... :-)

Now it seems to work properly! The updated CPAN version will be out soon, I hope.

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